A quality control manager takes an SRS of 500 phone batteries from factory A, where 5% of the batteries have a defect. the manag

Question

2 years ago

15

A quality control manager takes an SRS of 500 phone batteries from factory A, where 5% of the batteries have a defect. the manag

er also takes an independent SRS of 250 batteries from factory B, where 9% of proportions of the batteries have a defect. The manager will then look at the difference (B-A) between the proportions of defective batteries in each sample.
What are the mean and standard deviation of the sampling distribution of the difference in sample proportions?

*answer choices attatched*

If possible an explanation would also be appreciated; any unrelated answer is getting deleted

Advanced Placement (AP)

1 answer:

lukranit [14] · Answer 1 · 2022-10-28T23:24:16+03:00

lukranit [14]2 years ago

5 0

Answer: A

Explanation: